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Also available in the Sportster model beginning in 1986, it was made in the 1,100 cc (67 cu in) displacement until 1988 and is still made in the 883 cc (53.9 cu in) and 1,200 cc (73 cu in) [1] displacements for the Harley-Davidson Sportster, replacing the ironhead Sportster engine. Most analysts consider the Evolution to be the engine that ...
Comet models were included in Mercury brochures, workshop manuals, and advertisements for the first time for 1962. [37] The Comet Drive automatic transmission was also renamed to Merc-O-Matic Drive for 1962. [38] [39] By adding Comet to the Mercury line of cars, Mercury brand sales on paper more than doubled from 1961 to 1962. [40]
In 1960, the only engine available was the 144 cid Thriftpower straight-six with a single-barrel Holley carburetor, which produced 90 hp (67 kW) at 4200 rpm. (Some sources list it as producing 85 hp (63 kW) at 4200 rpm.) Transmission options were a column-shifted three-speed manual and a two-speed Comet-Drive automatic transmission.
The ironhead was a Harley-Davidson motorcycle engine, so named because of the composition of the cylinder heads (Iron instead of Aluminium). The engine is a two-cylinder, two valves per cylinder, pushrod V-twin. It was produced from 1957 until 1985 and was replaced by the Evolution engine in 1986.
This type of clutch is designed to partially disengage or "slip" when the rear wheel tries to drive the engine faster than it would run under its own power. The engine braking forces in conventional clutches will normally be transmitted back along the drive chain causing the rear wheel to hop, chatter or lose traction. [3]
The 1941 Chrysler M4 Vacamatic transmission was a two-speed manual transmission with an integral underdrive unit, a traditional manual clutch, and a fluid coupling between the engine and the clutch. [51] [52] [53] The two-speed transmission had "high" and "low" ranges, and the clutch was used when the driver wanted to switch between ranges. For ...
It is a stepless, fully-automatic transmission, consisting of a V-shaped drive-belt, and two pulleys, each of two cones, whose effective diameter can be changed so that the "V" belt runs nearer the spindle or nearer the rim, depending on the separation of the cones. These are synchronized so that the belt always remains at the same optimal tension.
Comet designed the 7-cylinder radial series to take advantage of the boom in private aviation in the late 1920s; intending to replace the large number of relatively unreliable wartime surplus engines that flooded the market in the early 1920s.